For example, if you are trying to create a CNAME record for the domain "www.yourdomain.com", you will need to delete the A Record for the host "www"

Click Continue to move to the confirmation stage

Click Continue to confirm the list of requested changes

Return to Step 4 above to finish creating your CNAME Record

CNAMEs can take up to 48 hours to propagate. Once it's ready, you can ensure your pages are published where you want by making sure your domain is added to Unbounce and your landing pages are pointing to your custom domain.